St. Vincent and fellow Kanye West interuptee Beck were the singer’s first surprise guests of the night. The indie rockers joined Swift for a pyro-packed performance of "Dreams," the new song from Beck’s upcoming album.

Swift didn’t have any guests for her highly-anticipated "Style" catwalk, taking the stage solo and leaving fans wondering what surprises were still in store.

And she didn’t disappoint, introducing John Legend as the third surprise guest of the night. The singer, who was spotted in the crowd with wife Chrissy Teigen earlier in the night, joined Swift onstage to sing his hit ballad "All of Me."

The duet was totally spontaneous, Swift told the crowd, admitting, "I found out John and Chrissy were coming thirty minutes before I went on and called Chrissy and asked her if John would perform."